Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4999007 | Vari-focal lens system | Hirofumi Tsuchida, Atsujirou Ishii | 1991-03-12 |
| 4998807 | Variable focal length lens system | Tsutomu Uzawa, Atsujiro Ishii | 1991-03-12 |
| 4906079 | Zoom lens system | Shinichi Mihara, Tsutomu Inanobe, Takeshi Hashimoto | 1990-03-06 |
| 4883346 | Zoom lens system | Juro Kikuchi | 1989-11-28 |
| 4830476 | Compact zoom lens system | — | 1989-05-16 |